I was setting UPS XML integration over the last 2 weeks and keep banging the wall with this error message:-
This shipping method is currently unavailable. If you would like to ship using this shipping method, please contact us.
As I still new to Magento, It took me 2 weeks to get to the root cause, in the begining I suspect the problem was related to UPS account or access key so I keep testing around them, but turn out to be unit of measure issue.
Some of the test products, I've uom to 200 which turn out to be 200Kg which over 70KG limit after I stumble across this site with advice of turning on debug mode:-
http://www.magentocommerce.com/boards/viewthread/4283/
And the log reveal the cause:-
<RatingServiceSelectionResponse><Response><TransactionReference><CustomerContext>Rating and Service</CustomerContext><XpciVersion>1.0</XpciVersion></TransactionReference><ResponseStatusCode>0</ResponseStatusCode><ResponseStatusDescription>Failure</ResponseStatusDescription><Error><ErrorSeverity>Hard</ErrorSeverity><ErrorCode>111036</ErrorCode><ErrorDescription>The maximum per package weight for the selected service from the selected country is 70.00 kg.</ErrorDescription></Error></Response></RatingServiceSelectionResponse>
I wonder why can't the detail or specify error be shown on front-end site!
